Improvement in molds or presses for making paper barrels



HUBBARD. 'MOLDS ORPRESSES FOR MAKING PAPER BARRELS.

Patnted'Fem-l, 1876.

No.17Z-,856.

ATTURNEY.

UNITED STATES PATENT lemon EBER HUBBARD, OI} MEDINA, NEW YORK, ASSIGNOR OF ONE-HALF HIS RIGHT TO IVES MANUFACTURING COMPANY, OF SAME PLACE.

IMPROVEMENT IN MOLD$OR PRESSES FOR MAKING PAPE R BABRELS.

Specification forming part of Letters Patent No. 172,856, dated February 1, 1876; application file November 22, 1875.

To an whom it may concern:

'Be it known that 1, EBER HUBBARD, of Medina, in the county of Orleans and State of New York, have invented certain new and useful Improvements in Molds or Presses for Pulp Barrels, of which the following is a specification:

This invention has for its object the production of a barrel or other similar article of any convenient size,'a-nd composed of ordinary ,resents a number of staves, preferably of metal,

which staves have such form given to them that when set up their interiorsurtace shall have the form desired for the exterior of the barrel. B B are a number of staves or sections, which, when set up inside the stavesA A, form a cone having an exterior form corresponding to that desired for the interior of the barrel. 0 O are rings, of which there may be two or more. These rings are passed over the ends of the staves A A in the manner of hoops upon a barrel, and by their pressure preserve the external form of the mold. The annular space between the staves A A and the sections B B being filled with pulp it can readily be seen that by driving the rings 0 0 toward the center of the mold. the pulp will be compressed into the desired shape.

The special structure of the several parts of the mold will now be described.

The number of the staves A A and sections B B may be as many as desired, and as each member of these two classes of staves A and B is a counterpart of its fellows a description of one member of each class will suffice for the whole number. The stave A is perforated, as seen in the drawing, and on its inside over the perforations is secured in any suitable'mannor a wire-gauze or similar device, a. Upon the inner edge of one side of the stave is secured a strip of thin metal forming a lap orrabbet, o This rabbet prevents the pulp from being forced out between the staves as the pressure increases, before the edges of th staves form a tight joint. Upon the back, c the stave are three ribs, two of which for] the edge of the stave A, and one is a centr: rib, b. Each end of the sections B is forme into an ofi'setfor giving a croze or some sim lar formation to the ends of the barrel whe pressed into shape, and said sections are pe fora-ted and covered ontheir exterior su face with wire-gauze in the same manner as the interior surface of the staves'A. The se tious B are also provided with lugs d, whit serve to steady the sections and assist in hob ing them together when setting them up b fore pressure is brought upon the mold t serving as supports for the rings d One the sections B has its edges beveled the r verse of the others, by which means it can i readily removed from the mold when the ba rel is made, after which removal the 0th sections may be easily taken out also. Tl ring (J is provided with slots or notches which notches guide it as it is forced up( the staves A A. ,These staves are also he together by wire pins 1) p.

The complete operation of the mold or pre can now be understood. The staves and se tious being all set up,'as above described, a1 the annular space between them filled wi any suitable pulp, the rings 0 G are form over the staves A by screw-power or by a1 other suitable power, when the pulp will i compressed, as the rings approach each othe into the desired shape, the water contained the pulp at the same time being forced 0 through the perforations in the staves a1 gauze. The shaped pulp, still under pressui may now be subjected to any suitable dryil process, the heat-reachin g it through the Wii gauze and theperforations in the slaves, bo from the inside and outside. When the shap barrel is considered dry enough the rings 0- are removed from the staves A A. The stav thus released from pressure can readily withdrawn, as above described, from conta with the barrel, and the barrel, as a complet article, is ready to be headed in any desi manner.

Having, thus fully described this press mold as of my invention, I claim- 1. A mold for the fabrication, from straw )ulp, of barrels and other similar articles, said nold being composed of an outer and inner set if perforated staves or sections, in the annular :pace between which sets of staves the barrel s formed under pressure from without exerted nwardly upon the outer staves or sections, in he manner substantially as hereinbefore deacribed, for the purposes set forth.

2. The detachable perforated inner staves 3 B, provided with lugs d, in the manner sub- :tantially as hereinbefore described, for the )urposes set forth.

3. The detachable perforated outer staves k A, provided with rabbets a and exterior ongitudinal ribs, in the manner substantially is hereinbefore described, for the purposes set 'orth.

4. The combination, with the outer and in ner sets of staves A A B B, constructed substantially in the manner hereinbefore described, of the external rings 0 0, whereby suitable pressure is applied to said outer staves, and currents of air admitted between and around said sets of staves, all for the purposes hereinbefore set forth.

In testimony that I claim the foregoing as my own I atfix my signature in presence of two witnesses.

EBER HUBBARD.

Witnesses ELLIS J. IVES, FRED M. IVES. 

